CN101639412B - Method for determining slagging prevention capacity of boiler by zoning - Google Patents
Method for determining slagging prevention capacity of boiler by zoning Download PDFInfo
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- CN101639412B CN101639412B CN 200810117572 CN200810117572A CN101639412B CN 101639412 B CN101639412 B CN 101639412B CN 200810117572 CN200810117572 CN 200810117572 CN 200810117572 A CN200810117572 A CN 200810117572A CN 101639412 B CN101639412 B CN 101639412B
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- prevention capacity
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002265 prevention Effects 0.000 title claims abstract description 7
- 238000013316 zoning Methods 0.000 title abstract 2
- 239000003245 coal Substances 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 239000010883 coal ash Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- 238000003556 assay Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000002956 ash Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
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Abstract
The invention provides a method for determining slagging prevention capacity of a boiler by zoning. The method comprises the following steps: testing the boiler by using coal of different slagging indexes Sc, and evaluating the slagging prevention capacity of the boiler according to the boiler adapting to the coal of the different slagging indexes.
Description
Technical field
The present invention relates to a kind of subregion and determine the method for slagging prevention capacity of boiler.
Background technology
Adopt the boiler of coal dust firing mode, no matter amount of capacity, the slagging scorification problem is the subject matter of harm boiler safety and available rate always.The basic reason of burner hearth slagging scorification is that different coals have different coal ash ash deposition propensities.But then, the size in the layout of combustion system, arrangement of burner, soot blower, combustion space and cross section influences the slagging scorification of blast furnace equally, and the coal of same slagging scorification performance uses on different boilers, and its slagging scorification degree is different.And in the method for alleviating ash erosion, it also is different mixing on different boilers and burning its effect of identical coal.These have all shown boiler, and this is differentiated on anti-slag ability.
But up to now qualitative the and quantitative index of the anti-slag ability of boiler neither one is estimated it and differentiated.
The objective of the invention is according to the boiler design characteristics, the anti-slag ability of boiler zones of different is carried out qualitative and quantitative analysis, and the grade discrimination index is proposed, and the slagging scorification index of this index and coal sample is connected, be convenient to boiler and when mixing burning, burn coal and determination of ratio mixing.
Summary of the invention
The invention provides a kind of subregion and determine the method for slagging prevention capacity of boiler, this method comprises the following steps:
(A) test boiler with the coal of different slagging index Sc;
(B) according to the anti-slag grade of the described boiler of following standard evaluation:
Wherein Sc measures according to following method:
(1) the coal ash softening temperature ST (carrying out) of measurement coal sample according to GB GB/T219-1996 " assay method of coal ash melting property ";
(2) carry out components of coal ash CaO, MgO, Fe
2O
3, K
2O, Na
2O, SiO
2, Al
2O
3And TiO
2Test (according to GB GB/T1574-1995 or 2007);
(3) carry out the calculating of slagging index Sc: (the quick slagging scorification method of discrimination that draws by ST, B/A is called S to Sc=2.521-0.00165ST+0.350 (B/A)
TBAMethod of discrimination, promptly according to the relation between ST and the B/A index, the preliminary clinkering property of judging fire coal),
B/A=(CaO+MgO+Fe wherein
2O
3+ K
2O+Na
2O)/(SiO
2+ Al
2O
3+ TiO
2) (the wherein components of coal ash weight content of the compound of above this molecular formula representative measured of each molecular formula representative);
Wherein the coal slagging index that adapts to of boiler is meant that boiler moves at least one month with the coal of described slagging index and do not have the slagging scorification problem that causes blowing out in a minute shield, burner hearth or three zones of furnace hopper.
Three main region (burner region (burner hearth), furnace hopper and dreg removing system, branch shield (or large-size screen monitors) and furnace outlet) of boiler are estimated respectively, that each anti-slag performance in zone is divided into is excellent, in and the difference Three Estate, estimate the anti-clinkering property of boiler with a poorest index.
By above-mentioned relevance principle, the Sc that can join burning from the more serious Firing Shenhua Coal of slagging scorification and other steam coal and join the burning proportional curve then is that numerical value such as 0.85,0.65 and 0.45 is determined the feasible burning ratio of joining in Sc.
Embodiment
The inventor gathers different coal samples and measures coal ash softening temperature ST and components of coal ash according to GB GB/T219-1996 " assay method of coal ash melting property " and GB/T1574-1995, according to Sc=2.521-0.00165ST+0.350 (B/A) (B/A=(CaO+MgO+Fe
2O
3+ K
2O+Na
2O)/(SiO
2+ Al
2O
3+ TiO
2)) calculating Sc.Wherein Firing Shenhua Coal Sc is about about 0.70, belongs to more serious slagging scorification coal.The Sc of Datong District's coal, Yanzhou coal＜0.45, low slagging scorification coal in promptly belonging to, and the Sc of Australian coal, Pingshou coal, accurate Ge Er coal and Huainan coal is between 0.65 to 0.85, belongs to high slagging scorification coal.Pass judgment on the boiler that above-mentioned coal uses the boiler of Firing Shenhua Coal to state China and coastland and may use Firing Shenhua Coal, cause the standard of the slagging scorification problem of blowing out, obtained following result according to operation at least one month nothing:
The anti-slag merit rating of table state China and coastal main boiler of power plant equipment
From as can be seen above, by method of the present invention, can carry out grade classification to the resistive connection slag ability of boiler, with boiler design characteristics and coal coupling, power plant can determine corresponding mixed-fuel burning proportion according to the power of boiler resistive connection slag ability.
Claims (2)
1. the method for slagging prevention capacity of boiler is determined in a subregion, and this method comprises the following steps:
(A) test boiler with the coal of different slagging index Sc;
(B) according to the anti-slag grade of the described boiler of following standard evaluation:
Wherein Sc measures according to following method:
(1) measures the coal ash softening temperature ST of coal sample according to GB GB/T219-1996 " assay method of coal ash melting property ";
(2) carry out components of coal ash CaO, MgO, Fe according to GB GB/T1574-1995 or 2007
2O
3, K
2O, Na
2O, SiO
2, Al
2O
3And TiO
2Test;
(3) carry out the calculating of slagging index Sc: Sc=2.521-0.00165ST+0.350 (B/A),
B/A=(CaO+MgO+Fe wherein
2O
3+ K
2O+Na
2O)/(SiO
2+ Al
2O
3+ TiO
2), wherein the coal slagging index that adapts to of boiler is meant that boiler moves at least one month with the coal of described slagging index and do not have the slagging scorification problem that causes blowing out in a minute shield, burner hearth or three zones of furnace hopper.
2. method according to claim 1 is wherein estimated the anti-clinkering property of boiler with a poorest index in a minute shield, burner hearth, three zones of furnace hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810117572 CN101639412B (en) | 2008-08-01 | 2008-08-01 | Method for determining slagging prevention capacity of boiler by zoning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810117572 CN101639412B (en) | 2008-08-01 | 2008-08-01 | Method for determining slagging prevention capacity of boiler by zoning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101639412A CN101639412A (en) | 2010-02-03 |
| CN101639412B true CN101639412B (en) | 2011-11-09 |
Family
ID=41614504
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|---|---|---|---|
| CN 200810117572 Active CN101639412B (en) | 2008-08-01 | 2008-08-01 | Method for determining slagging prevention capacity of boiler by zoning |
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| Country | Link |
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| CN (1) | CN101639412B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964297B (en) * | 2015-06-24 | 2017-06-16 | 华北电力科学研究院有限责任公司 | Boiler scaling situation determines method |
| CN109798537B (en) * | 2019-01-25 | 2019-12-10 | 西安热工研究院有限公司 | coal quality parameter control method for ensuring safe operation of eastern Junggar coal boiler |
| CN110907431B (en) * | 2019-07-03 | 2022-09-06 | 上海理工大学 | Coal slagging degree judging method |
| CN111413482A (en) * | 2020-04-08 | 2020-07-14 | 西安热工研究院有限公司 | Method for judging coal slagging performance based on initial slagging temperature |
| CN111876534A (en) * | 2020-06-22 | 2020-11-03 | 山西太钢不锈钢股份有限公司 | Method for reducing blast furnace tuyere and spray gun slag receiving |
| CN113446594B (en) * | 2021-07-30 | 2022-08-16 | 西安热工研究院有限公司 | Method capable of rapidly judging slag bonding and contamination conditions of boiler heating surface |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091507A (en) * | 1993-10-11 | 1994-08-31 | 浙江大学 | Boiler scaling automatic forecast method and system |
| CN1912588A (en) * | 2006-08-23 | 2007-02-14 | 太原市海通自动化技术有限公司 | Coal on-line analyse equipment based on laser induced spectral and nerve network technology |
| CN201014433Y (en) * | 2007-02-16 | 2008-01-30 | 哈尔滨工业大学 | Coat powder combustion device for vertical thick-thin combustion boiler for preventing slagging formation and high-temperature corrosion |
-
2008
- 2008-08-01 CN CN 200810117572 patent/CN101639412B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091507A (en) * | 1993-10-11 | 1994-08-31 | 浙江大学 | Boiler scaling automatic forecast method and system |
| CN1912588A (en) * | 2006-08-23 | 2007-02-14 | 太原市海通自动化技术有限公司 | Coal on-line analyse equipment based on laser induced spectral and nerve network technology |
| CN201014433Y (en) * | 2007-02-16 | 2008-01-30 | 哈尔滨工业大学 | Coat powder combustion device for vertical thick-thin combustion boiler for preventing slagging formation and high-temperature corrosion |
Non-Patent Citations (1)
| Title |
|---|
| 姚文达等.炉内结渣的预测.《火电厂锅炉运行及事故处理》.中国电力出版社,2007,(第1版),356-360. * |
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|---|---|
| CN101639412A (en) | 2010-02-03 |
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